React Calculator App | Keyboard Control | Styled Components & Testing

Hello Frontend Mentor Community 👋

I have just completed work on another project. For each solution, I aim to add something extra that improves the user experience during browsing and enhances my technology stack. This time, to enhance my expertise, I added component testing. I rely on your knowledge and experience in this area. Among the added features, I created button animation, keyboard control, and calculator validation.

I would greatly appreciate any feedback and advice you may be able to provide.